Karius and Bactus is a Norwegian children’s book whose main characters Sööbik (Karius) and Pisik (Bactus) live in the cavities of the teeth of a boy called Juss. They live a wonderful life as Juss eats white bread covered with syrup and does not brush his teeth afterwards. Eventually a dentist comes to his rescue.
The book, which is illustrated with humorous pictures and carries an important message, has been a children’s literary classic for generations of children in Scandinavia and elsewhere.
In Estonian the book was published as Karius and Bactus in 1972, translated by Arvo Alas.